Develop rigorous, client-ready energy concepts in hours, not weeks.
Take on more projects with the same team. Sympheny handles the scenario preparation so your engineers focus on the judgement clients actually pay for. For most teams, the time recovered pays back the licence cost within the first two projects.
In a 30 minute demo, see your project set up, scenarios compared, and a report ready to share.
Scenario setup, optimisation, and reporting in one workflow.
Swiss company · EU-hosted by default · US enterprise deployment options · Customer data remains yours
*Based on Sympheny's Solar Impulse Foundation impact assessment.
A rigorous optimisation engine wrapped in a practical planning platform.
Sympheny handles the whole planning job: assembling the data foundation, building a digital twin, running the optimisation, then comparing scenarios and getting the outcome in front of the people who decide.
One model for all energy carriers
Model electricity, heat, cooling, gas, hydrogen, storage and mobility together, instead of as separate studies that never quite line up. Sector-coupling options and infrastructure constraints sit side by side, so you compare them on the same footing.
- Multiple conversion technologies per hub
- Storage modelled inside the same optimisation
- Add custom technologies from your own assumptions
Iterate at district scale — without starting over.
Pull asset catalogues, hourly demand profiles, tariffs, GIS layers and meter data into a single model you can reuse. Go from one building to a 78-district city without rebuilding from scratch.
- GIS context for every building and hub
- Hourly demand and tariff profiles in one place
- Reusable across feasibility, planning and tendering
Outputs your stakeholders can actually read
Hourly demand profiles, load-duration curves, Sankey energy flows and Pareto cost/CO₂ comparisons — all generated from the same model and viewable directly in the app. Print to share, no rebuilding charts in slide decks.
- Hourly resolution across a full reference year
- Peak-shaving and storage-sizing visible at a glance
- Stakeholder-ready exports without manual rework
A short ramp-up to powerful, flexible energy modelling.
Sympheny gives expert users the flexibility of advanced energy system optimisation without a long implementation burden. For users with prior experience in optimisation or energy-system modelling, the platform can usually be understood in less than a week. Once workflows are established, many studies can be set up in around 30 minutes.
See why most teams recover the license cost after 1-2 projectsTime savings vary by project complexity, input data quality, and team experience. Examples reflect common workflows after the relevant setup is in place.
From building-level site data to a complete multi-energy concept.
Start from real GIS and building data. Optimise across electricity, heat, gas, solar and storage together. Hand stakeholders a Sankey energy flow and a structured report when you're done.
Proven from districts to campuses to whole-city strategies.
Green hydrogen produced on-site — at a production cost comparable to today's diesel. Life-cycle costs cut by 26% vs the fossil baseline.
Read case study16 PV and energy-sharing scenarios compared in one project. The optimal strategy cuts costs by 20–25% versus the existing setup.
Read case studyThree city-wide scenarios confirmed a net-zero energy supply is achievable — at similar life-cycle costs to today's fossil-based system.
Read case studyIt pays off quickly.
For most teams, the time Sympheny gives back on data prep and scenario work covers the annual licence cost within the first two projects.
Built for the organisations shaping local energy systems
These are the teams who turn a stack of technical options into a decision: a plan their organisation will fund and a client will sign off on.
Engineering & Consulting Teams
Engineers and project teams lose weeks wrangling scattered inputs into shape before they can build scenarios solid enough to put in front of a client.
Explore engineering workflowsUtilities & Energy Providers
Plan across sites, networks, tariffs and investment horizons that run decades out, with scenarios solid enough to back a real infrastructure call.
Explore utility workflowsCities & Public-Sector Planners
Build energy strategies, district plans and the reporting that goes with them, on a process that survives public-sector timelines and the people you have to bring along.
Explore public-sector planningDevelopers & Industrial Sites
Weigh site energy concepts on CAPEX, OPEX, CO₂, grid constraints and phasing before you commit to the big infrastructure spend.
Explore site planning workflowsRigour, usability, and proof in the same platform.
A concept only holds up if three things are true at once: the maths is sound, engineers will actually use the tool, and the output survives the meeting where a client picks it apart. That's the bar we built Sympheny to clear.
Calculations run on a deterministic MILP engine — no AI in the optimisation loop. Clustering is statistical; ML demand forecasting is opt-in and never trained on customer data.
Model electricity, heat, cooling, gas, hydrogen, storage and mobility together, so sector-coupling choices get judged as part of the same system rather than in isolation.
Commercially deployed since 2020, with 70+ customers and real-world references across districts, campuses, utilities, industrial sites, and policy scenarios. Includes the Nanoverbund thermal micro-grid in Basel, recipient of the Watt d'Or Prize 2025 from the Swiss Federal Office of Energy.
"Sympheny supports our strategic energy planning in an ideal way. The flexibility is extremely convincing and the sensitivity analysis provides security in finding solutions."
Built for consultants, developers, and utilities.
From a first feasibility concept to a full client portfolio — three tiers built around how energy planning teams actually work.
See pricingReady to deliver energy concepts faster, with more scenarios and clearer trade-offs?
See how much faster your team can build and compare scenarios.
In a 30 minute demo, see your project set up, scenarios compared, and a report ready to share.